CVE-2021-37735 in Aruba Instant
Summary
by MITRE • 10/12/2021
A remote denial of service vulnerability was discovered in Aruba Instant version(s): Aruba Instant 6.5.x.x: 6.5.4.18 and below; Aruba Instant 8.5.x.x: 8.5.0.10 and below; Aruba Instant 8.6.x.x: 8.6.0.4 and below. Aruba has released patches for Aruba Instant (IAP) that address this security vulnerability.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/15/2021
This remote denial of service vulnerability affects Aruba Instant access point firmware versions across multiple release streams including 6.5.x series up to 6.5.4.18, 8.5.x series up to 8.5.0.10, and 8.6.x series up to 8.6.0.4. The flaw resides in the handling of network packets or specific protocol implementations within the firmware that processes wireless communication traffic. Attackers can exploit this vulnerability by sending specially crafted network traffic to affected devices, causing them to become unresponsive or crash entirely. This represents a critical security issue as it allows remote attackers to disrupt wireless network services without requiring authentication or physical access to the affected hardware. The vulnerability falls under the category of denial of service attacks that can be executed from remote locations, making it particularly dangerous for enterprise wireless networks that rely on consistent availability of access points.
The technical implementation of this vulnerability demonstrates a failure in input validation or buffer handling within the Aruba Instant firmware codebase. When the affected devices receive malformed or unexpected network packets, the processing routines do not properly handle the edge cases, leading to system crashes or resource exhaustion. This type of flaw typically stems from inadequate bounds checking, improper memory management, or failure to validate packet headers and payload data before processing. The vulnerability can be classified as a software defect that violates the principle of robust error handling and input validation. From a cybersecurity perspective, this issue represents a weakness in the network infrastructure that could be exploited to create service disruption at scale, particularly in environments where multiple access points are deployed across large facilities.
The operational impact of this vulnerability extends beyond simple service disruption as it can affect enterprise wireless network availability and business continuity. Organizations relying on Aruba Instant access points for their wireless infrastructure may experience complete network outages in affected areas, particularly in mission-critical environments such as hospitals, airports, or industrial facilities where wireless connectivity is essential. The remote nature of the exploit means that attackers can target these devices from anywhere on the network, potentially causing widespread disruption without requiring physical presence or network access. This vulnerability also represents a potential vector for more sophisticated attacks, as initial denial of service can be used as a precursor to other exploitation techniques. Network administrators may find their monitoring systems unable to detect or respond to the attack due to the complete service disruption caused by the vulnerability.
Organizations should immediately implement the patches released by Aruba to address this vulnerability across all affected firmware versions. The remediation process requires careful planning and execution to avoid service disruption during the update process, particularly in large deployments where multiple access points need to be updated simultaneously. Network administrators should conduct thorough testing of the patches in controlled environments before deploying them to production systems. Additionally, implementing network segmentation and access controls can help limit the potential impact of exploitation attempts, while monitoring network traffic for unusual patterns may help detect attempted exploitation. The vulnerability highlights the importance of maintaining up-to-date firmware and implementing robust network monitoring practices to detect and respond to security incidents promptly. This case demonstrates the critical need for regular security assessments and patch management processes to protect against known vulnerabilities in network infrastructure components. Organizations should also consider implementing intrusion detection systems that can identify and alert on suspicious network traffic patterns that may indicate exploitation attempts against wireless infrastructure devices.